1import re 2import subprocess 3import time 4 5from unit.applications.lang.python import TestApplicationPython 6from unit.option import option 7 8 9class TestRespawn(TestApplicationPython): 10 prerequisites = {'modules': {'python': 'any'}} 11 12 PATTERN_ROUTER = 'unit: router' 13 PATTERN_CONTROLLER = 'unit: controller' 14 15 def setup_method(self): 16 self.app_name = "app-" + option.temp_dir.split('/')[-1] 17 18 self.load('empty', self.app_name) 19 20 assert 'success' in self.conf( 21 '1', 'applications/' + self.app_name + '/processes' 22 ) 23 24 def pid_by_name(self, name, ppid): 25 output = subprocess.check_output(['ps', 'ax', '-O', 'ppid']).decode() 26 m = re.search(r'\s*(\d+)\s*' + str(ppid) + r'.*' + name, output) 27 return None if m is None else m.group(1) 28 29 def kill_pids(self, *pids): 30 subprocess.call(['kill', '-9'] + list(pids)) 31 32 def wait_for_process(self, process, unit_pid): 33 for i in range(50): 34 found = self.pid_by_name(process, unit_pid) 35 36 if found is not None: 37 break 38 39 time.sleep(0.1) 40 41 return found 42 43 def find_proc(self, name, ppid, ps_output): 44 return re.findall(str(ppid) + r'.*' + name, ps_output) 45 46 def smoke_test(self, unit_pid): 47 for _ in range(5): 48 assert 'success' in self.conf( 49 '1', 'applications/' + self.app_name + '/processes' 50 ) 51 assert self.get()['status'] == 200 52 53 # Check if the only one router, controller, 54 # and application processes running. 55 56 out = subprocess.check_output(['ps', 'ax', '-O', 'ppid']).decode() 57 assert len(self.find_proc(self.PATTERN_ROUTER, unit_pid, out)) == 1 58 assert len(self.find_proc(self.PATTERN_CONTROLLER, unit_pid, out)) == 1 59 assert len(self.find_proc(self.app_name, unit_pid, out)) == 1 60 61 def test_respawn_router(self, skip_alert, unit_pid): 62 pid = self.pid_by_name(self.PATTERN_ROUTER, unit_pid) 63 64 self.kill_pids(pid) 65 skip_alert(r'process %s exited on signal 9' % pid) 66 67 assert self.wait_for_process(self.PATTERN_ROUTER, unit_pid) is not None 68 69 self.smoke_test(unit_pid) 70 71 def test_respawn_controller(self, skip_alert, unit_pid): 72 pid = self.pid_by_name(self.PATTERN_CONTROLLER, unit_pid) 73 74 self.kill_pids(pid) 75 skip_alert(r'process %s exited on signal 9' % pid) 76 77 assert self.wait_for_process( 78 self.PATTERN_CONTROLLER, unit_pid 79 ) is not None 80 81 assert self.get()['status'] == 200 82 83 self.smoke_test(unit_pid) 84 85 def test_respawn_application(self, skip_alert, unit_pid): 86 pid = self.pid_by_name(self.app_name, unit_pid) 87 88 self.kill_pids(pid) 89 skip_alert(r'process %s exited on signal 9' % pid) 90 91 assert self.wait_for_process(self.app_name, unit_pid) is not None 92 93 self.smoke_test(unit_pid) 94